JPH0132730B2 - - Google Patents
Info
- Publication number
- JPH0132730B2 JPH0132730B2 JP57036636A JP3663682A JPH0132730B2 JP H0132730 B2 JPH0132730 B2 JP H0132730B2 JP 57036636 A JP57036636 A JP 57036636A JP 3663682 A JP3663682 A JP 3663682A JP H0132730 B2 JPH0132730 B2 JP H0132730B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- rubber
- connection part
- insulated
- tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 14
- 239000005060 rubber Substances 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 13
- 229920003023 plastic Polymers 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 230000005684 electric field Effects 0.000 claims description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 7
- 239000012212 insulator Substances 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 ethylene-ethylene Chemical group 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
- H02G15/103—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
- H02G1/145—Moulds
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/003—Filling materials, e.g. solid or fluid insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
- H02G15/115—Boxes split perpendicularly to main cable direction
Landscapes
- Cable Accessories (AREA)
- Conductive Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、特に新規な縁切り構造をもつたゴ
ム・プラスチツク絶縁ケーブルの絶縁接続部に関
するものである。
従来、この種のゴム・プラスチツク絶縁ケーブ
ルの絶縁接続部の縁切り構造は、その一例を第１
図に示すように、接続した２個の導体１，１′を
中心とし、接続部絶縁遮蔽層すなわち内部及び外
部の２個の半導電層２及び５を同軸的に設けてス
リツト８を形成し、前記の内部半導電層２と外部
半導電層５との間には接続部補強絶縁体層を充填
形成せしめる。
しかして、CVケーブルの接続部の従来の構成
は、次の如く製作され形成される。すなわち、先
ず接続すべき２本のケーブルの端部をそれぞれ図
にもみられるように鉛筆状り削り、圧縮スリーブ
等で導体１，１′を接続した後、その上に半導電
性テープあるいは半導電性熱収縮チユーブにより
内部半導電層２を形成する。次いでこの内部半導
電層２の周囲に自己融着性絶縁テープなどのゴム
またプラスチツク絶縁テープを巻回した後、これ
を加圧加熱し一体に融着する。あるいは内部半導
電層２の周囲に所望の金型（図示せず）を設け、
そこに溶融樹脂を射出し成形した後、適当な手段
により加熱融着させることにより接続部補強絶縁
体層４を形成する。さらにこの接続部補強絶縁体
層４の外周を同軸的に縁切り部を設けた外部半導
電層５を設けて接続部が完成する。
しかしながら、このような従来のゴム・プラス
チツク絶縁ケーブルの絶縁接続部には多くの欠点
が存在した。すなわち、
(イ) テープ巻回層などを加熱し、一体に融着する
際にスリツト８を形成する半導電層５の先端が
変形してしまい、先端の電界が大きくなるた
め、形成された接続部はその先端から破壊し易
くなる。
(ロ) 半導電層５でスリツトを作成する際、同軸的
に同心円上にすることが困難であり、そのため
電界の乱れが生じ易い。
本発明は、従来の絶縁接続部における上述の如
き欠点を除去し、半導電層のスリツトを必要とし
ない安定にして簡易な絶縁接続部を提供しようと
するにある。
本発明のゴム・プラスチツク絶縁ケーブルの絶
縁接続部は、第２図にもみられるように、ゴム・
プラスチツク絶縁ケーブルのケーブル導体接続部
を覆う絶縁補強層４の外周上に、基体ゴム100重
量部に対して炭化珪素50〜700重量部及びカーボ
ン２〜60重量部を混和せしめた混和物からなる電
界緩和層７を介して同軸状に左右対向した状態に
絶縁遮蔽層６，６′を設けたことを特徴とする。
すなわち、ゴム・プラスチツク絶縁ケーブルの
接続部補強絶縁体層４上に基体ゴム100重量部に
対し炭化珪素50〜700重量部及びカーボン２〜60
重量部を混和配合した体積固有抵抗107〜1012
Ω・cm、誘電率６〜100である電界緩和層７を介
して同軸状に外部半導電層６，６′を設けること
により、絶縁接続部を形成したものである。
かかる本発明の構造による効果、特徴は次の如
くである。
(い) 従来のスリツト形状の絶縁接続部に比較し
た特徴：
スリツトを形成する半導電層５が変形する
ことによる破壊値の低下がなくなり、絶縁接
続部の特性が向上する。
形状が普通直線接続部と差がないため、従
つて非常に製造が簡単である。
従来の導電スリツトの絶縁接続部に比べて
本発明では短時間でできる。
(ろ) カーボン含有高抵抗層構造に比べての特
徴：
従来このような高抵抗型縁切り部としてはカ
ーボン含有量を適当に調整することにより、上
記インピーダンス範囲（ここでインピーダンス
範囲とは前記抵抗、誘導率からなる混和物を交
流に対する抵抗をいう）の高抵抗層を絶縁体円
周上に設ける方法があるが、この方法では、カ
ーボンのみ含有した高抵抗層がヒートサイクル
等の熱履歴により抵抗値が変動し易いという問
題がある。一方、ベースポリマーに炭化珪素の
みを配合した場合は必要なインピーダンス範囲
に調整することが難しいという問題点がある。
これに対して本発明ではカーボンと共に炭化珪
素を配合した組成物からなる電界緩和層を設け
たことにより、必要なインピーダンス範囲に調
整が容易で熱的に安定しているという特徴を有
する。
絶縁縁切り部の形成法は次の如くにする。すな
わち、
(1) 前記配合組成テープを接続部補強絶縁体層４
上に巻回する。場合によつては本テープを巻回
した後、接続部補強絶縁体層４にこれを加熱融
着させる。
(2) 予め前記配合組成物からなる円筒を、設計し
た接続部補強絶縁体層４の外径に合わせて作成
し、補強絶縁体層４を成形後、この補強絶縁体
層４上に該円筒を挿入被覆し、加熱融着する。
(3) 補強層絶縁成形後、この絶縁層上に金型を置
き、絶縁縁切り部の設計に合わせて、前記の配
合組成物を射出あるいは押出成形する。さらに
絶縁層に加熱融着させる。
本発明においては、前記の接続部補強絶縁体層
４と前記の配合テープとの接着性が良好でなけれ
ばならない。そのため前記基体ゴムとしては、エ
チレンプロピレンゴム、エチレン―プロピレン―
ポリマー、エチレン―酢酸ビニルゴム、アクリル
ゴム、フツ素ゴム、エチレン―エチレンアクリレ
ートゴム、スチレン―ブタジエンゴム、ブタジエ
ンゴムの使用が好ましい。
次に本発明における数量限定の理由を簡単に述
べると、炭化珪素が50重量未満では、熱履歴によ
つて電気抵抗が変化するので、不可である。又
700重量部を越えると、組成物が非常に硬くなり、
加工しにくいので不可である。又、カーボンが２
重量部未満では、所望の誘電率抵抗が得られない
ので、不可であり、逆に60重量部を越えると、組
成物が硬くなり、加工しにくいので不可である。
万特にモールド型接続部に用いる場合は、テー
プ巻き目によるボイド生成を避けるために混和物
が薄いテープに加工できる必要があり炭化珪素の
配合量は50〜200重量部であることが好ましい。
以下本発明をさらに実施例について説明する。
実施例１〜４、比較例１
600mm2154KV CVケーブルを鉛筆削り後、圧縮
スリーブ（図示せず）で導体１，１′を接続後、
半導電性テープ（日本ユニカー株式会社製商品名
DFDJ 0580をテープ化したもの）を、導体接続
部上に巻回した後、温度150℃で４時間加熱成形
した。その後、形成した導電層周囲に金型（図示
せず）を取付け、300mm押出機から架橋剤入りポ
リエチレン組成物〔HFDJ 4201（日本ユニカー株
式会社製商品名）〕を金型内に押出し成形した。
この押出機（図示せず）の設定温度は120℃であ
つた。次に冷却後前記金型を取外し、形成した接
続部補強絶縁体層４の第２図に示す絶縁縁切り部
には次の第１表に示す組成物のテープをその他の
個所には上記の半導電性テープをそれぞれ巻い
た。又、比較例１としては、従来法に基づき接続
部補強絶縁体層４中に外部半導電層６によりスリ
ツト間２mmの間隔で縁切り部を作成したものを作
つた。次いでそれぞれの接続部を加硫管（図示せ
ず）中に入れ、窒素ガス８Kg／cm2雰囲気で温度
210℃にて６時間加熱した後、ガス加圧下にて冷
却した。尚、ジヨイント補強絶縁体層の厚さは25
mm、絶縁縁切り部の長さは100mmであつた。
実施例１〜４のうち、実施例３、４はテープ組
成に架橋剤（ジクミルパーオキサイド）及び酸化
防止剤を配合し架橋組成としたものであり、未架
橋テープとして巻回後、加硫管内でのガス加圧加
硫により補強絶縁体と一体加硫ができる。このよ
うに、電界緩和層として架橋組成を用いればより
耐熱性にすぐれた絶縁接続部を提供できる。
The present invention particularly relates to an insulated connection for a rubber-plastic insulated cable with a novel edge-cutting structure. Conventionally, the edge cutting structure of the insulated connection part of this type of rubber/plastic insulated cable is as follows.
As shown in the figure, a slit 8 is formed by coaxially providing two connected conductors 1 and 1' with an insulating shielding layer for the connection part, that is, two semiconducting layers 2 and 5 on the inside and outside. A connecting portion reinforcing insulating layer is filled between the inner semiconducting layer 2 and the outer semiconducting layer 5. Thus, the conventional configuration of the CV cable connection is manufactured and formed as follows. That is, first, as shown in the figure, the ends of the two cables to be connected are each shaved into a pencil shape, the conductors 1 and 1' are connected with a compression sleeve, etc., and then a semiconductive tape or a semiconductive The inner semiconducting layer 2 is formed by a heat-shrinkable tube. Next, a rubber or plastic insulating tape such as a self-adhesive insulating tape is wound around the inner semiconducting layer 2, and then the tape is heated under pressure to be fused together. Alternatively, a desired mold (not shown) is provided around the internal semiconducting layer 2,
After injection molding a molten resin thereon, the connecting portion reinforcing insulator layer 4 is formed by heat-sealing by appropriate means. Further, an external semiconducting layer 5 is provided coaxially on the outer periphery of the connecting portion reinforcing insulating layer 4, and an edge cut portion is provided thereon to complete the connecting portion. However, the insulated connections of such conventional rubber-plastic insulated cables have a number of drawbacks. In other words, (a) When the tape-wound layer is heated and fused together, the tip of the semiconductive layer 5 that forms the slit 8 is deformed, and the electric field at the tip increases, causing the formed connection to deteriorate. The part becomes easier to break from the tip. (b) When creating slits in the semiconducting layer 5, it is difficult to make them coaxially on a concentric circle, which tends to cause disturbances in the electric field. The present invention aims to eliminate the above-mentioned drawbacks of conventional insulating connections and to provide a stable and simple insulating connection that does not require slits in the semiconducting layer. The insulated connection part of the rubber/plastic insulated cable of the present invention is made of rubber/plastic as shown in
An electric field made of a mixture of 50 to 700 parts by weight of silicon carbide and 2 to 60 parts by weight of carbon to 100 parts by weight of base rubber is applied on the outer periphery of the insulation reinforcing layer 4 covering the cable conductor connection part of the plastic insulated cable. The present invention is characterized in that insulating shielding layers 6 and 6' are provided coaxially and laterally opposed to each other with a relaxation layer 7 interposed therebetween. That is, 50 to 700 parts by weight of silicon carbide and 2 to 60 parts by weight of carbon are added to 100 parts by weight of the base rubber on the reinforcing insulator layer 4 of the connection part of the rubber/plastic insulated cable.
Volume resistivity mixed with parts by weight 10 7 to 10 12
An insulated connection portion is formed by providing external semiconducting layers 6, 6' coaxially through an electric field relaxation layer 7 having a dielectric constant of 6 to 100 Ω·cm. The effects and features of the structure of the present invention are as follows. (b) Features compared to conventional slit-shaped insulated connections: There is no reduction in breakdown value due to deformation of the semiconducting layer 5 forming the slits, and the characteristics of the insulated connections are improved. Since the shape does not differ from a normal straight connection, it is therefore very simple to manufacture. Compared to conventional conductive slit insulating connections, the present invention can be made in a shorter time. (b) Features compared to carbon-containing high-resistance layer structure: Conventionally, such a high-resistance type edge cutting part has been developed by appropriately adjusting the carbon content. There is a method of forming a high-resistance layer containing a mixture of conductivity (resistance to alternating current) on the circumference of the insulator, but in this method, the high-resistance layer containing only carbon loses its resistance due to thermal history such as heat cycles. There is a problem that the value tends to fluctuate. On the other hand, when only silicon carbide is blended into the base polymer, there is a problem that it is difficult to adjust the impedance to a required range.
In contrast, in the present invention, by providing an electric field relaxation layer made of a composition containing carbon and silicon carbide, the present invention is characterized in that it is easy to adjust the impedance to a required range and is thermally stable. The method for forming the insulating edge cut portion is as follows. That is, (1) the above-mentioned composition tape is attached to the connecting portion reinforcing insulating layer 4;
Roll it up. In some cases, after winding the tape, it is heat-fused to the connecting portion reinforcing insulating layer 4. (2) A cylinder made of the blended composition is prepared in advance according to the outer diameter of the designed connecting portion reinforcing insulating layer 4, and after molding the reinforcing insulating layer 4, the cylinder is placed on this reinforcing insulating layer 4. Insert, cover, and heat-seal. (3) After insulating the reinforcing layer, a mold is placed on the insulating layer, and the above compounded composition is injected or extruded according to the design of the insulating edges. Furthermore, it is heated and fused to the insulating layer. In the present invention, the adhesion between the connection portion reinforcing insulator layer 4 and the compound tape must be good. Therefore, as the base rubber, ethylene-propylene rubber, ethylene-propylene-
Preferably, polymers, ethylene-vinyl acetate rubber, acrylic rubber, fluororubber, ethylene-ethylene acrylate rubber, styrene-butadiene rubber, and butadiene rubber are used. Next, to briefly describe the reason for the limitation in quantity in the present invention, it is impossible to use less than 50 weight silicon carbide because the electrical resistance changes depending on the thermal history. or
If it exceeds 700 parts by weight, the composition becomes very hard;
This is not possible because it is difficult to process. Also, carbon is 2
If it is less than 60 parts by weight, it is not acceptable because the desired dielectric constant resistance cannot be obtained.On the other hand, if it exceeds 60 parts by weight, it is not acceptable because the composition becomes hard and difficult to process. In particular, when used in a molded joint, the mixture must be able to be processed into a thin tape in order to avoid void formation due to tape winding, and the amount of silicon carbide blended is preferably 50 to 200 parts by weight. The present invention will be further described below with reference to Examples. Examples 1 to 4, Comparative Example 1 After sharpening the pencil of the 600mm 2 154KV CV cable and connecting conductors 1 and 1' with a compression sleeve (not shown),
Semi-conductive tape (product name manufactured by Nippon Unicar Co., Ltd.)
A tape made of DFDJ 0580) was wound onto the conductor connection portion and then heat-molded at a temperature of 150° C. for 4 hours. Thereafter, a mold (not shown) was attached around the formed conductive layer, and a crosslinking agent-containing polyethylene composition [HFDJ 4201 (trade name, manufactured by Nippon Unicar Co., Ltd.)] was extruded into the mold using a 300 mm extruder.
The set temperature of this extruder (not shown) was 120°C. Next, after cooling, the mold was removed, and a tape of the composition shown in Table 1 below was applied to the insulating edge cut part shown in FIG. Each was wrapped with conductive tape. In addition, as Comparative Example 1, edge cut portions were made in the connecting portion reinforcing insulating layer 4 using the outer semiconducting layer 6 at intervals of 2 mm between the slits based on a conventional method. Next, each connection part was placed in a vulcanization tube (not shown) and heated to a temperature of 8 kg/cm 2 of nitrogen gas.
After heating at 210°C for 6 hours, it was cooled under gas pressure. In addition, the thickness of the joint reinforcement insulator layer is 25
mm, and the length of the insulation edge cut portion was 100 mm. Among Examples 1 to 4, Examples 3 and 4 were made by blending a crosslinking agent (dicumyl peroxide) and an antioxidant into the tape composition to form a crosslinked composition, and after winding as an uncrosslinked tape, vulcanization was performed. It can be vulcanized integrally with the reinforcing insulator by gas pressure vulcanization inside the pipe. In this way, by using a crosslinked composition as the electric field relaxation layer, an insulated connection portion with better heat resistance can be provided.
【表】
第１表に示すように、本実施例１〜４による絶
縁接続部は、何れも第１図に示す従来構造の比較
例１に比し交流破壊値が高く安定であり、接続部
の特性が非常に優れているほか、半導電層のスリ
ーブを必要としない簡易にして製作の作業性もよ
い絶縁接続部が得られる。
実施例５、比較例２
600mm2154KV CVケーブルを鉛筆削り後、圧縮
スリーブで導体１，１′を接続後、この導体接続
部上に半導電性テープ（古河電工社製商品名導電
性Ｃテープ）を巻回し、更にこの半導電層６上に
エチレンプロピレンゴムを基体にした絶縁テープ
（古河電工社製商品名エフコ31号）を絶縁厚50mm
となるまで巻回し、接続部補強絶縁体層４を形成
した。この補強接続層４上の第２図に示した絶縁
縁切り部には、前記第１表の実施例１と同一組成
物のテープを他の個所には上記半導電層テープを
それぞれ巻いた加熱融着一体化して絶縁接続部を
作つた。しかして得た本絶縁接続部の交流破壊試
験を実施したところ、520KV破壊であつた。
本実施例の構成で縁切り部を有さない普通接続
部の破壊値はモールド型よりも低く、通常
500KV程度であるので、520KVという値は絶縁
接続部として充分満足できる数値を示していると
いえる。
一方、比較のため実施例５と、同様に半導電層
上にエチレンプロピレンゴムテープで補強絶縁層
４を形成し、その上に半導電性テープによりスリ
ツト間隔２mmで第１図のような従来構造の縁切り
部を構成した絶縁接続部（比較例２）は、交流破
壊値420KVで、スリツト部先端から破壊した。
本実施例５においても、前記実施例１〜４にお
けると略々同様な本発明の効果が認められた。[Table] As shown in Table 1, the insulated connections according to Examples 1 to 4 all have higher AC breakdown values and are more stable than Comparative Example 1 of the conventional structure shown in FIG. In addition to having very excellent properties, it is possible to obtain an insulated connection part that does not require a semiconductive layer sleeve and is simple and easy to manufacture. Example 5, Comparative Example 2 600mm 2 154KV After sharpening the pencil of the CV cable and connecting conductors 1 and 1' with a compression sleeve, apply semiconductive tape (product name: Conductive C Tape manufactured by Furukawa Electric Co., Ltd.) on the conductor connection part. ) is wound, and an insulating tape (manufactured by Furukawa Electric Co., Ltd., product name: E-co No. 31) based on ethylene propylene rubber is further applied to the semiconductive layer 6 with an insulation thickness of 50 mm.
The connecting portion reinforcing insulator layer 4 was formed by winding the wire until it became . The insulating edge cut portion shown in FIG. 2 on the reinforcing connection layer 4 was covered with a tape of the same composition as in Example 1 of Table 1, and the other portions were heated and fused with the above semiconductive layer tape. I made an insulated connection part by integrating the parts. When we conducted an AC breakdown test on this insulated connection, we found a breakdown of 520KV. In the structure of this example, the failure value of the ordinary connection part without edge cutting part is lower than that of the molded type, and
Since the voltage is about 500KV, it can be said that the value of 520KV is sufficiently satisfactory as an insulated connection part. On the other hand, for comparison, a reinforcing insulating layer 4 was formed on the semiconductive layer using ethylene propylene rubber tape in the same manner as in Example 5, and a conventional structure as shown in FIG. The insulated connection part (Comparative Example 2) that constituted the edge cutting part broke from the tip of the slit part with an AC breakdown value of 420 KV. In Example 5, substantially the same effects of the present invention as in Examples 1 to 4 were observed.
第１図はゴム・プラスチツク絶縁ケーブルの従
来の絶縁接続部の一例を示す部分縦断面略図、第
２図は本発明の絶縁接続部の一実施例を示す部分
縦断面略図である。
１，１′……導体、２……内部半導電層、３…
…ケーブル絶縁体層、４……接続部補強絶縁体
層、５……接続部外部半導電層、６……接続部外
部半導電層、７……電界緩和層、８……スリツト
部。
FIG. 1 is a schematic partial vertical cross-sectional view showing an example of a conventional insulated connection part of a rubber-plastic insulated cable, and FIG. 2 is a schematic partial vertical cross-sectional view showing an embodiment of the insulated connection part of the present invention. 1, 1'...Conductor, 2...Inner semiconducting layer, 3...
... Cable insulator layer, 4 ... Connection part reinforcing insulator layer, 5 ... Connection part external semiconducting layer, 6 ... Connection part external semiconducting layer, 7 ... Electric field relaxation layer, 8 ... Slit part.
Claims (1)
導体接続部を覆う絶縁補強層の外周に絶縁遮蔽層
を設けてなるゴム・プラスチツク絶縁ケーブルの
絶縁接続部において、前記絶縁遮蔽層が同軸的に
設けられた基体ゴム100重量部に対し炭化珪素50
〜700重量部及びカーボン２〜60重量部を混和せ
しめた混和物から成る電界緩和層を介して左右対
向した状態に設けられていることを特徴とするゴ
ム・プラスチツク絶縁ケーブルの絶縁接続部。1. In the insulated connection part of a rubber/plastic insulated cable, in which an insulating shielding layer is provided on the outer periphery of an insulating reinforcing layer that covers the cable conductor connection part of the rubber/plastic insulated cable, a base rubber on which the insulating shielding layer is coaxially provided. 50% silicon carbide per 100 parts by weight
An insulated connection part of a rubber/plastic insulated cable, characterized in that the insulated connection part of a rubber/plastic insulated cable is provided in a state where the left and right sides face each other with an electric field relaxation layer made of a mixture of 700 parts by weight and 2 to 60 parts by weight of carbon interposed therebetween.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57036636A JPS58157318A (en) | 1982-03-10 | 1982-03-10 | Insulated connecting unit for rubber or plastic insulated cable |
| US06/472,940 US4458103A (en) | 1982-03-10 | 1983-03-07 | Insulating joint for rubber or plastic insulated power cable |
| EP83102363A EP0088450B1 (en) | 1982-03-10 | 1983-03-10 | Insulating joint for rubber or plastic insulated power cable |
| DE8383102363T DE3361147D1 (en) | 1982-03-10 | 1983-03-10 | Insulating joint for rubber or plastic insulated power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57036636A JPS58157318A (en) | 1982-03-10 | 1982-03-10 | Insulated connecting unit for rubber or plastic insulated cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58157318A JPS58157318A (en) | 1983-09-19 |
| JPH0132730B2 true JPH0132730B2 (en) | 1989-07-10 |
Family
ID=12475321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57036636A Granted JPS58157318A (en) | 1982-03-10 | 1982-03-10 | Insulated connecting unit for rubber or plastic insulated cable |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4458103A (en) |
| EP (1) | EP0088450B1 (en) |
| JP (1) | JPS58157318A (en) |
| DE (1) | DE3361147D1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK156351C (en) * | 1986-05-07 | 1990-01-02 | Nordiske Kabel Traad | PROCEDURE FOR RESTORING SEMI-CONDUCTIVE LAYERS ABOUT A CABLE SPLIT AND CABLE FOR USE IN EXERCISING THE PROCEDURE |
| JPH01159907A (en) * | 1987-12-16 | 1989-06-22 | Canon Inc | Conductive material |
| ES2072351T3 (en) * | 1990-01-09 | 1995-07-16 | Rxs Schrumpftech Garnituren | PROCEDURE FOR THE MANUFACTURE OF A FIELD CONTROL LINING FOR MEDIUM VOLTAGE CABLE FITTINGS. |
| US5408047A (en) * | 1990-10-25 | 1995-04-18 | Minnesota Mining And Manufacturing Company | Transition joint for oil-filled cables |
| JP3260749B2 (en) * | 1990-10-25 | 2002-02-25 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | Transition joint for oil-filled cable |
| GB9600819D0 (en) * | 1996-01-16 | 1996-03-20 | Raychem Gmbh | Electrical stress control |
| EP1128514A1 (en) * | 2000-02-23 | 2001-08-29 | NKT Power Cables A/S | An insulating cable connection |
| JP2005106185A (en) * | 2003-09-30 | 2005-04-21 | Tokai Rubber Ind Ltd | Rubber hose material and rubber hose using the same |
| SE530587C2 (en) * | 2006-10-31 | 2008-07-15 | Abb Research Ltd | Electric field control material |
| SE531409C2 (en) * | 2006-12-20 | 2009-03-24 | Abb Research Ltd | Field-controlling material |
| EP2197080A1 (en) * | 2008-12-09 | 2010-06-16 | ABB Research Ltd. | Flexible joint with resistive field grading material for HVDC cables and method for connecting same to HVDC cables |
| CN104530611B (en) * | 2014-12-31 | 2016-09-07 | 宁波佳乐特橡塑机电有限公司 | A kind of grinding roller sealing ring material and preparation method thereof |
| KR20170107326A (en) * | 2016-03-15 | 2017-09-25 | 엘에스전선 주식회사 | An insulating composition having low dielectric constant and cable comprising an insulating layer formed from the same |
| CN107868305A (en) * | 2017-12-12 | 2018-04-03 | 马鞍山市东方仪表有限公司 | A kind of method for improving instrument cable insulation layer ageing-resistant performance |
| CN108359204B (en) * | 2018-01-26 | 2020-07-14 | 上海蓝昊电气有限公司 | Strippable insulation shielding material for medium-voltage rubber cable and preparation process thereof |
| CN110922687B (en) * | 2019-12-09 | 2022-07-05 | 哈尔滨理工大学 | Modified nano zinc oxide/ethylene propylene diene monomer rubber-based cable accessory material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51121056A (en) * | 1975-04-11 | 1976-10-22 | Sola Basic Ind Inc | Elastomer materials for reducing stress and apparatus made by elastomer materials |
| JPS55117808A (en) * | 1979-03-01 | 1980-09-10 | Furukawa Electric Co Ltd | Flame resisting semiconductor composition |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1433129A (en) * | 1972-09-01 | 1976-04-22 | Raychem Ltd | Materials having non-linear resistance characteristics |
| FR2294568A1 (en) * | 1974-12-11 | 1976-07-09 | Siemens Ag | Electric cable fittings prodn. - by expanding and solidifying resin mass in mould placed around cable ends |
| GB2030014B (en) * | 1978-07-17 | 1983-01-06 | Sumitomo Electric Industries | Method of connecting cables |
| JPS5832448Y2 (en) * | 1979-01-31 | 1983-07-19 | 昭和電線電纜株式会社 | Shielding edges of insulated connections |
| JPS55117820A (en) * | 1979-03-05 | 1980-09-10 | Showa Electric Wire & Cable Co | Electric field alleviating selffadhesive tape and end of high voltage power cable used with same tape |
| FI69943C (en) * | 1979-07-10 | 1986-05-26 | Sumitomo Electric Industries | FOERFARANDE FOER BILDANDE AV EN FOERBINDNING FOER EN POLYOLEFINISOLERAD ELEKTRISK LEDNING ELLER KABEL OCH VAERMEKRYMPANDE SLANG FOER GENOMFOERANDE AV FOERFARANDET |
| DE2939932A1 (en) * | 1979-09-28 | 1981-04-02 | Siemens AG, 1000 Berlin und 8000 München | PRE-PREPARED ELASTIC SLEEVE BODY FOR PLASTIC-INSULATED SHIELDED POWER CABLES |
| GB2038111B (en) * | 1979-12-18 | 1983-05-05 | Amerace Corp | Cable repair kit |
-
1982
- 1982-03-10 JP JP57036636A patent/JPS58157318A/en active Granted
-
1983
- 1983-03-07 US US06/472,940 patent/US4458103A/en not_active Expired - Lifetime
- 1983-03-10 DE DE8383102363T patent/DE3361147D1/en not_active Expired
- 1983-03-10 EP EP83102363A patent/EP0088450B1/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51121056A (en) * | 1975-04-11 | 1976-10-22 | Sola Basic Ind Inc | Elastomer materials for reducing stress and apparatus made by elastomer materials |
| JPS55117808A (en) * | 1979-03-01 | 1980-09-10 | Furukawa Electric Co Ltd | Flame resisting semiconductor composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58157318A (en) | 1983-09-19 |
| US4458103A (en) | 1984-07-03 |
| DE3361147D1 (en) | 1985-12-12 |
| EP0088450A1 (en) | 1983-09-14 |
| EP0088450B1 (en) | 1985-11-06 |
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